Search studies

Find detailed reviews about specific areas of Washington’s transportation system in our collection of planning studies.

You might be looking for projects or local projects

Filter studies

Select
Select

61 results

Anacortes/San Juan Islands Schedule Update

Location:
Timeline: Spring 2023 - Winter 2025
  • In progress
  • Improve on-time performance​.
  • Support reliability of service and system​.
  • Provide adequate travel opportunities for key user groups​.
  • Maintain as much capacity as possible​.

Task Force

Register to attend the next

Frequent Transit Service Study

Location:
Timeline: March 2022 - June 2023
  • Complete

​In its 2022 session, the Legislature directed WSDOT to conduct a study about statewide transit service benchmarks. The initial report proposed a definition of frequent fixed-route transit and documented how many people in Washington live within a half-mile walk of frequent fixed-route transit

Heritage Connectivity Trails – Phase 1 Project

Location:
Timeline: 2023-2025
  • In progress

The Heritage Connectivity Trails (HCT) project creates over 150 miles of walking paths throughout the lower Yakima Valley on Yakama Nation land. This project is important to the area because this stretch of US 97 has a high pedestrian fatality rate in the state of Washington.

In

I-5 Bridgeport Way Pre-Design Study

Location: I-5
Timeline: March - September 2023
  • Complete
  • Pierce County

WSDOT is relocating the signal pole and utility cabinet at the intersection of Bridgeport Way and the I-5 northbound off and on ramps. The existing signal system requires frequent and extensive maintenance repairs. While planning for these improvements, the pre-design study conducted a complete

I-5 Fort Lewis Weigh Station Study

Location: I-5
Timeline: August 2020 - June 2021
  • Complete
  • Thurston County
  • Pierce County

The Fort Lewis Weigh Station located along northbound Interstate 5 near DuPont in Pierce County is in need of updating. Freight traffic in the area experiences recurring congestion and delay due to high volumes from both freight and commuter traffic. The weigh station was

I-5 Operations and Demand Analysis

Location: I-5, SR 11, SR 539, SR 542
Timeline: July 2018 - September 2020
  • Complete
  • Whatcom County

The Northwest Region Mount Baker Area is leading this effort to address several mobility challenges along segments of the I-5 corridor within the urban area of Bellingham (MP 250 to MP 258). Congestion occurs regularly during peak travel at the I-5 interchanges and on the connecting regional

I-5 Skagit Transportation Study

Location: I-5
Timeline: March 2023 - July 2024
  • In progress
  • Skagit County

The 9-mile stretch of I-5 between Mount Vernon and Burlington is the backbone of the transportation network in Skagit County, powering the economy, linking local businesses to regional markets and connecting people to jobs, goods and each other. To plan for future growth, address safety and

I-5 Study

Location: I-5
Timeline: Initial phase complete, next phase begins in early 2024
  • In progress

In Spring 2022 the Legislature initiated the Move Ahead Washington funding package to create planning and environmental linkages studies for Interstate 5. This work will ultimately create a master plan for the critical I-5 corridor that meets current and future transportation needs, and reflects

I-5 Tumwater to Mounts Road Corridor Planning and Environmental Linkages Study

Location: I-5
Timeline: Spring 2020 - Spring 2022
  • Complete
  • Thurston County
  • Pierce County

The "Planning and Environmental Linkages Study" (PEL study) built upon the goals and strategies outlined in the original 2020 Corridor Study. This PEL Study represents a collaborative and integrated approach to transportation decision-making that:

  1. Considers environmental,

I-5 Wildlife Habitat Connectivity Study

Location:
Timeline: July 2023 - TBD
  • In progress

I-5 creates a barrier to wildlife, hampering their east/west movements and leading to the death of many animals that attempt to cross it. Recent studies indicate that I-5, with daily traffic volumes between 38,000 and 68,000 vehicles across both study sites, is a large enough barrier to cause

I-90 Judkins Park Station - Reconnecting communities - Environmental justice assessment

Location:
Timeline: 2023-2027
  • In progress

Washington's environmental justice law, known as the Healthy Environment for All (HEAL) Act, requires WSDOT to conduct environmental justice assessments when considering significant agency actions. These actions are those that initiated after July 1, 2023, and consist of WSDOT transportation

North Lewis County Industrial Access Transportation Study

Location: I-5
Timeline: Sept. 2022 - Dec, 2023
  • Complete
  • Lewis County

To keep people and goods moving throughout western Washington State, the Washington State Department of Transportation is working with local stakeholders and government leaders to conduct a study to assess existing environmental and traffic conditions and reviewing new

Public Transportation Unmet Needs Study

Location:
Timeline: July 2021 - June 2023
  • Complete

In 2022, WSDOT reviewed state and regional transportation plans, interviewed 30 people made up of transportation riders, providers, and advocates, and developed an economic model to answer the following two questions:

  1. What is the unmet need for public transportation in the state

South Pierce Multimodal Connectivity Study

Location: SR 162, SR 161, SR 7, SR 507, I-5
Timeline: Spring 2022 - September 2023
  • Complete
  • Pierce County

WSDOT, in collaboration with community partners, studied a large area of south Pierce County, identifying potential projects and policies to reduce fatal and serious injury crash potential, improve travel conditions for all travelers, and provide greater system connectivity and resilience.

SR 105 West Harriman Street Signal - Roundabout Pre-Design Study

Location: SR 105
Timeline: January 2021 - May 2021
  • Complete
  • Grays Harbor County

The pre-design study looked at the signalized intersection on SR 105, South Boone Street, at West Harriman Street. The aging traffic signal at this intersection was last replaced in 1982 and is in need of replacement. The pre-design study conducted stakeholder and public outreach to examine

SR 112 Clallam Bay Pre-Design Study

Location: SR 112
Timeline: January to August 2023
  • Complete
  • Clallam County

State Route 112 at Weel Road and Eagle Crest Way is just south of Clallam Bay. This study will make recommendations for improvements at the intersection. The study will engage local stakeholders and the community to identify these improvements. Recommendations made as a result of this study will

SR 141 Bingen to White Salmon - Paving Project Complete Streets Pre-design Study

Location: SR 141
Timeline: November 2023 – Late 2024
  • In progress
  • Klickitat County

This project will repave SR 141/Jewett Boulevard from milepost 0.00 at the intersection of SR 14 in Bingen to milepost 1.77 west of Jewett Lane in White Salmon. The pre-design study will include a Complete Streets analysis to identify improvements for pedestrians and bicyclists traveling through

SR 142 - Safety and Accessibility Study

Location: SR 142
Timeline: 2019 - 2022
  • On hold
  • Klickitat County

Currently, pedestrian access along State Route 142 is limited for people who walk, bike or roll alongside the highway. With input from community members, elected officials and stakeholders, we will develop a plan to improve accessibility for all modes in the community of Klickitat. 

SR 16 - Tacoma Narrows Bridge to SR 3 Congestion Study

Location: SR 16
Timeline: November 2016 - December 2018
  • Complete
  • Kitsap County
  • Pierce County

The study identifies corridor strategies and solutions to address congestion and traffic operations along State Route 16 between the Tacoma Narrows Bridge and Gorst, as well as portions of SR 3 and SR 304 in Pierce and Kitsap counties. 

SR 160 Long Lake Road SE Planning Study

Location: SR 160
Timeline: Fall 2016 - Spring 2018
  • Complete
  • Kitsap County

A study was completed of SR 160 between Phillips Road and Mayvolt Road Southeast/Lake Valley Road Southeast in Kitsap County. The study identified intersection control strategies that have the potential to reduce the frequency and severity of crashes at the intersection of SR 160

SR 162 Orville Road Pre-design Study

Location: SR 162
Timeline: October 2023 to March 2024
  • In progress
  • Pierce County

WSDOT routinely reviews rural intersections on the state highway system to find ways to reduce potential crashes. We look for locations that are at the highest risk for severe crashes. During this pre-design, we will conduct traffic and crash analysis, working with the community to develop the

SR 162 Sumner to Orting Corridor Planning Study

Location: SR 162
Timeline: Spring 2016 - Spring 2017
  • Complete
  • Pierce County

State Route 162 is an important north-south link through the Orting Valley community and the surrounding area of southeast Pierce County. The area experiences a high level of growth and development resulting in peak hour congestion that places demands on the highway system. The study

SR 166 Bay Street/Bethel Avenue/Maple Avenue Intersection Pre-Design Study

Location: SR 166
Timeline: December 2019 - June 2020
  • Complete
  • Kitsap County

A pre-design study was conducted at the intersection of SR 166 and Bay Street, Bethel Avenue and Maple Street in Port Orchard. The existing traffic signal at this intersection has reached the end of its useful life. This in-depth review included collaboration with local

SR 167 Master Plan

Location: SR 167
Timeline: The SR 167 Master Plan started in earnest in fall 2021 and we completed the SR 167 Master Plan update in June 2023.
  • Complete
  • Pierce County
  • King County

The Puget Sound region is thriving and attracting large population and employment growth. This growth increases strain on our transportation infrastructure and services, resulting in increased traffic congestion and increased needs for maintenance and preservation. There is a need to move people

SR 20 - Discovery Road & Kearney Street Intersection Roundabouts Pre-Design Study

Location: SR 20
Timeline: Spring 2020 - Fall 2020
  • Complete
  • Jefferson County

SR 20 Skagit O'Brian Reach Feasibility Study

Location: SR 20
Timeline: January 2022 - December 2023
  • Complete
  • Skagit County

The SR 20 Skagit River O’Brian Reach Feasibility Study area is located along SR 20 near Rockport at milepost 101. This section of SR 20 experiences frequent embankment erosion and flooding and has required repeated emergency repairs following floods in the Skagit River. The purpose of the study

SR 202 - E Lake Sammamish Parkway to 244th Ave NE - Corridor Planning Study

Location: SR 202
Timeline: Summer 2018 - Summer 2019
  • Complete
  • King County

State Route 202 is an important east-west link for King County communities like Woodinville, Redmond, Sammamish, Fall City and North Bend. Thanks to growth and development, traffic on SR 202 has increased in the last decade, contributing to longer travel times for commuters and freight.

SR 202 Corridor Studies

Location: SR 202
Timeline: Fall 2020 - Winter 2022
  • In progress
  • King County

We are conducting two corridor studies along SR 202. One study will focus on safety concerns between 244th Ave. NE to 324th Ave. SE, and the second study will cover community needs between 324 Ave. SE and SR 203 in Fall City.

Both studies will document strategies to improve

SR 24 East Valley to Moxee Corridor Study

Location:
Timeline: June 2022 - April 2023
  • In progress
  • Yakima County

The study will collaboratively address the transportation network performance, accessibility and safety gaps to support local communities and the traveling public in the East Valley area. The study will identify ranked strategies to increase mobility and transportation alternatives for all modes

SR 3 Gorst Area Planning and Environmental Linkages Study and NEPA

Location: SR 3
Timeline: January 2024 - December 2025
  • In progress
  • Kitsap County

This study looks at adding a lane to SR 3 in each direction from Gorst to SR 304. It also explores elevating the roadway through Gorst, replacing the Navy’s railroad crossing of SR 3 and replacing nearby fish barriers.

Slow down on ice and snow.

It's easier to skid or lose control traveling at higher speeds. Give yourself more time to stop.

Carry chains, practice installing them.

Winter conditions could mean chains are required on your route. Practice putting them on your vehicle ahead of time.

Pack your winter car kit.

Carry extra supplies like warm clothing, ice scraper and brush, jumper cables and other emergency items.